Can onions and garlic be eaten together?

Jun 10, 2025 Source: Cainiu Health

Dr. Yu Yongchao

Introduction

Under normal circumstances, onions and garlic can be consumed together. Both onions and garlic are common ingredients that are rich in various nutrients, such as vitamin C, selenium, sulfides, and others. These components help enhance immunity and reduce the risk of cardiovascular diseases. In addition, combining them in meals can enhance the flavor of dishes, making them more delicious.

Generally speaking, onions and garlic can be consumed together, but excessive intake should be avoided. The detailed explanation is as follows:

Onions and garlic are both common ingredients rich in various nutrients, such as vitamin C, selenium, sulfides, and others, which help enhance immunity and reduce the risk of cardiovascular diseases. In addition, combining them when cooking can enhance the flavor of dishes, making them more delicious. For most people, moderate consumption of onions and garlic is safe.

However, the pungent compounds in onions and garlic may irritate the gastric mucosa, and excessive consumption can easily lead to abdominal pain, diarrhea, and other symptoms. Particularly for individuals with gastric ulcers or excessive stomach acid, excessive intake may worsen symptoms. Furthermore, sulfides in onions and garlic are metabolized in the body and produce odorous byproducts that are excreted through breath and sweat. Consuming large amounts may thus lead to bad breath and body odor. Therefore, it is recommended to control the consumption of onions and garlic.

In daily diets, balanced intake of various foods and attention to food combinations are essential to better meet the body's nutritional needs and promote health.

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